By the sixth week in utero, the medial nasal processes form the philtrum of the lip, and the right and left maxillary processes form the sides of the upper lip. A disturbance at this time may result in:

Question

Quizplus · Accepted Answer

Cleft lip results from a disturbance in the fusion of the medial nasal processes and the maxillary processes during the sixth week in utero, leading to a failure in the formation of the upper lip's continuity.

By the Sixth Week in Utero, the Medial Nasal Processes